The Official Journal of the European Union (OJ) is the main source of EUR-Lex content. It is published daily (from Monday
to Saturday regularly, on Sundays only in urgent cases) in the official EU languages. There are 2 series:

L (legislation)

C (information and notices).

Subseries CA (e.g. C019A), with the same number as the C series published on the same day, contains calls for expressions of interest,
vacancy notices, etc. CA editions may appear in one, several or all official languages.

A new subseries, LI and CI, was introduced on 1 January 2016. This allows for greater flexibility in the event of a change in the planned content of
the Official Journal. It was used for the first time on 16 January 2016 (L011I, C015I).